How Long Would It Take to Fix a Larger Sized Gap in the Top Teeth?

As a rule of thumb, Invisalign moves teeth 0.2mm per aligner, each aligner used for two weeks.  A gap as shown likely will take a couple months to close.  Traditional brackets likely will work faster, but with all their drawbacks.

it looks like ,the width of the upper teeth is smaller as compared to your jaw size.plus the teeth are converging in shape at inscisal edges.spaces can be closed,but emrasures will be divergent leading to unesthetic smile.consider invisalign/damon braces followed by ceramic veneers .

With Invisalign we can close gaps very easily.

The INvisalign system will close the front middle gap within 3-4 months. Gaps will then develop on either side of the 2 front teeth, which will then be closed next. All in all the gaps get ransferred to the back of the arch.

You should be looking at small white buttons on the front teeth and about 1 year with Invisalign.

Dr R Kumar BDSLDSRCS

From the picturesYour bit looks correctable with tooth movement, the gap, however, looks more difficult and may need bonding or veneers. An orthodontist will know whether the tooth size on top matche the tooth size on the bottom. If they don't you will need bonding to close spaces.

Its hard to say from the pix as to what condition your bite is in on all your other teeth. To close gaps like yours tho,in general,is from 5-8 months under normal conditions. You can go for a free consult and find out for certain the estimated time for treatment would be...Dr Thomas